Question

In a 500 ml capacity vessel and are mixed to form$\mathrm { COCl } _ { 2 }$. At equilibrium, it contains 0.2 moles of $\mathrm { COCl } _ { 2 }$ and 0.1 mole of each of and$\mathrm { CO } _ { 2 }$. The equilibrium constant $K _ { c }$ for the reaction $\mathrm { CO } + \mathrm { Cl } _ { 2 }$ ⇌$\mathrm { COCl } _ { 2 }$ is.

• A. 5
• B. 10
• C. 15
• D. 20

Answer 1

Answer: (B)

10

Answer 2

$\mathrm { CO } + \mathrm { Cl } _ { 2 }$ ⇌ $\mathrm { COCl } _ { 2 }$

$[ C O ] = \frac { 0.1 } { 0.5 }$, $\left[ C l _ { 2 } \right] = \frac { 0.1 } { 0.5 }$, $\left[ \mathrm { COCl } _ { 2 } \right] = \frac { 0.2 } { 0.5 }$

$= \frac { \left[ \mathrm { COCl } _ { 2 } \right] } { [ \mathrm { CO } ] \left[ \mathrm { Cl } _ { 2 } \right] } = 0 \frac { \frac { 0.2 } { 0.5 } } { \frac { 0.1 } { 0.5 } \times \frac { 0.1 } { 0.5 } } = \frac { 2 } { 5 } \times 25 = 10$